Fine-Tune: Resetting your LDEV 21 Console
July 13, 2018
I have a 959 system at my site and there are times when I can't get the remote console port on LDEV 21 to work. How do I troubleshoot this problem and reset the console port?
1. Is the port configured and available?
a) Check to be sure the system recognizes the port
:showdev 21
LDEV AVAIL
21 AVAIL
b) Is the SYSGEN configuration okay?
:sysgen sysgen>io
io> ld 21
LDEV:21 DEVNAME: OUTDEV:21 MODE: JAID**ID: A1703-60003-CONSOLE-TERMINAL
RSIZE: 40 DEVTYPE: TERM**PATH: 56/56.1 MPETYPE: 16 MPESUBTYPE: 0CLASS: TERM
c) Is the User Port configured in NMMGR?
:nmmgr
then ...
OPEN CONF, DTS, USER PORT
Logical Device [21 ] (1 - 1800)
Line Speed [2400 ] (300, 1200, 9600, or 19200 bps)
Modem Type [1] (0-NONE, 1-US, 2-European, 3 - V22.bis)
Parity [NONE] (None, Even, Odd, 0's, or 1's)
a) Check/Change the configuration
cm> CA
Bit rate: 2400 bits/sec
Protocol: Bell
System identification:
b) Enable Remote
cm> ER
c) Unlock Remote and raise the DTR signal on the modem
cm> U
d) Go back to command mode (:).
cm> CO
3. If you still cannot dial into the remote console, there are two utilities in sysdiag you can try. Modmutil will do a self test on the modem, and consolan will reset the port.
a) To test the modem:
:sysdiag
dui> modmutil
mu> diag
diag> autotest
diag> exit
mu> exit
b) To reset the modem
:sysdiag
dui> CONSOLAN pdev=nn/nn section=2(23)
Continue? YES
Reset local/remote? REMOTE